Contact resurfacing device



March 13, 1934. s, A OAKLEY CONTACT RESURFACING DEVICE Filed June 14, 1930 final-Linin s;

:====silr nillm Patented Mar. 13, 1934 UNITED STATES This invention is a novel CONTACT RESURFACING DEVICE 10 Claims.

improvement in contact resurfacing devices, and the principal object thereof is to provide a simple novel and efficient hand-operated device for resurfacing and truing contacts of various types, in the distributors and other ignition systems for particularly those used parts of battery automobiles; also contacts used in magnetoes, voltage regulators, and various other types of electrical ap I will explain the invention the accompanying drawing practical embodiment thereof to adopt and use the same;

paratus.

with reference to which illustrates one to enable others and will summarize in the claims the novel features of construction, and novel combinations of parts, for which protection is desired.

In said drawing:

tact arm in grinding position;

and also showing in dotted lines a cylindrical contact in grinding position. 7

Fig. 3 is an inside plan view or casing detached, showing th for the insertion of the contacts,

at the sides of the openings.

Fig. 4 is a section on As shown, my novel prises a disk-like base flange la extending from one of the outer shell e openings therein and the slots the line 4-4 Fig. 2.

device preferably com- 1, having a peripheral side and provided with an axially disposed tubular extension 2 at the other side thereof, the tube 2 having a flange 2a (Fig. 2) preferably swaged ing in the base 1 whereby tube around an open- 2 and base 1 are solidly united to form a unit. Base 1 and tube 2 however may be united in any other desired manner, or may be formed integral; and

base is preferably made very thin to permit abrading v as hereinafter described.

In base 1 around the tube of steel and preferably" ery short contacts 2 are a plurality of circular openings, four being shown and numbered 3, 4, 5 and 6, which openings are preferably of various diameters to suit various sizes of contacts C inserted therethrough, while the arms B on which contacts C held in contact with and seate are mounted are d squarely against the back of base 1 as indicated in Figs. 2 and 3,

At opposite sides of the smaller openings 3,

4 and 5 (Fig. 3) are elongated parallel slots '7 which are adapted to receive F which are turned up on oer the usual flanges tain types of conto permit the flanges F to pass through base 1 so that correct seating contact can be made by the contact F against the back face of base 1 when such contact is positioned thereagainst for abrading operation.

Tube 2 forms a snugly fitting bearing for a shaft 8 which carries on its outer end a disk 9 (Fig. 2) of slightly smaller diameter than the internal diameter of base flange la, the disk 9 being normally housed in and free to rotate within the flange 1a. The snug fit of shaft 8 within tube 2 maintains disk 9 constantly parallel with the base 1. Preferably disk 9 is secured to the end of shaft 8 by a screw 10. Secured to the inner face of disk 9 is an abrasive disk 11 (Fig. 2) of suitable grinding or abrading material adapted to grind the face of the contact C when inserted through one of the openings 3, 4, 5 or 6, disk 11 being rotated by means of handle 12 to grind the face of contact C parallel with the plane of its arm B or F, which arm is held contacting squarely with the back face of base 1 as hereinafter described.

Said contact holding means preferably comprises a split-clamp 13 around tube 2 having a bore to suit the tube 2, the clamp being contracted around tube 2 by nut 14. Adjacent one end of clamp 13 is a tapped bore 131) through which passes a screw 15 adapted to hold the contact arm B or F seated squarely againstthe back face of the base 1 while the contact C carried by the arm B extends through the opening 3, c, 5 or 6 as shown in Fig. 2, whereby the arm B will be prevented from backing away from base 1 during the grinding operation, thereby assuring that the ground face of contact C will be finished parallel with the adjacent face of arm B or F. Clamp 13 can be loosened and adjusted so that the point of screw 15 will lie directly over the center of each of the openings 3, 4, 5 or 6, the screw is securing clamp 13 to tube 2 in any desired position.

Clamp 13 is also provided with a V-shaped bore 16 (Fig. 4;) adapted to receive elongated contacts E of various shapes as shown in dotted lines in Figs. 1, 2 and 4, which contacts E are held in bore 16 by set screw 17 so that the end of the contact E will pass through one of the openings 3, 4, 5 or 6 and be securely disk 11 in position for operation thereon and the ground or resurfaced end of contact E will be normal to its longitudinal axis.

In operation, after the contact arm B is placed in the position shown in tact breaker arms F and diameters, such Fig. 2 and the screw 15 advanced to properly seat the arm against the base 1 with the contact C extending through one of the holes 3, 4, 5 or 6, the disk 11 is then rotated by handle 12 to grind or cut away the desired amount of material from the face of contact C. As the arm B is on the opposite side of base 1 from the disk 11 there will be no danger of the disk grinding away the entire contact C down to the arm B, the same being prevented by the thickness of the material of the base 1. If the contact arms are provided with flanges at each side of the contact (such as flanges F, Fig. 3) these flanges will enter the slots '7 in the base 1 permitting the base F to still seat squarely against the back face of base 1 so that the groLmd face of the contact C will be finished true with the base.

I do not limit my invention to the exact form shown in the drawing for obviously changes may be made therein within the scope of the claims.

I claim:-

1. A contact resurfacing device, comprising a base provided with an opening and having a pcripheral flange extending from one side and having an axially disposed tubular portion extending from the other side; an axially movable shaft journaled in said tubular portion; an abrading disk on said shaft normally disposed within said peripheral flange and adapted to engage a contact when entered through the opening; means for rotating the disk; and a clamp adjustably mounted upon the tubular portion; and adjustable means on the clamp for holding the contact against the base with a portion of the contact entering the opening.

2. In a device as set forth in claim 1, slots beside the opening for the purpose specified.

3. A contact resurfacing device, comprising a base provided with an opening and having a tubular portion extending from one side; a rotatable shaft journaled in said tubular portion; an abrading disk on said shaft disposed parallel with said base and adapted to engage a contact when entered through the opening, said contact being mounted on an arm; a clamp adjustably mounted upon the tubular portion; and adjustable means on the clamp for holding the arm against the base with the contact entering the opening.

4. A contact resurfacing device, comprising a base provided with an opening and having a pcripheral flange extending from one side and having an axially disposed tubular portion extending from the other side; a rotatable shaft journaled in said tubular portion; an abrading disk on said shaft normally disposed within said peripheal flange and adapted to engage a contact when entered through the opening; means for holding the contact in abrading position; and slots beside the opening for the purpose specified.

5. A contact resurfacing device, comprising a base provided with an opening and having a peripheral flange extending from one side and having an axially disposed tubular portion extending from the other side; a rotatable shaft journaled in said tubular portion; an abrading disk on said shaft normally disposed within said peripheral flange and adapted to engage a contact when entered through the opening; said contact being mounted on an arm; a split clamp adjustably mounted upon the tubular portion; and adjustable means on the clamp for holding the arm against the base with the contact entering the opening.

6. In a device as set forth in claim 5, slots beside the opening for the purpose specified.

7. A contact resurfacing device, comprising a base provided with an opening and having a peripheral flange extending from one side and having an axially disposed tubular portion extending from the other side; an axially movable shaft rotatably journaled in said tubular portion; an abrading disk on said shaft normally disposed within said peripheral flange and adapted to engage a contact when entered through the opening; means for rotating the disk; means for holding the contact in abrading position; and slots beside the opening for the purpose specified.

8. A contact resurfacing device, comprising a base provided with an opening and having a peripheral flange extending from one side and having an axially disposed tubular portion extending from the other side; an axially movable shaft rotatably journaled in said tubular portion; an abrading disk on said shaft normally disposed within said peripheral flange and adapted to engage a contact when entered through the opening; disk; said contact being mounted on an arm; a split clamp adjustably mounted upon the tubular portion; and adjustable means on the clamp for holding the arm against the base with the contact entering the opening.

9. In a device as set forth in claim 8, slots beside the opening for the purpose specified.

10. A facing tool for contact points consisting of a face plate having a sleeve extending normally therefrom, a grinding wheel occupying a plane parallel with said face plate and having a spindle slidably 'journaled in said sleeve, and a holder adjustably mounted on said sleeve for clamping a contact, point against said face plate in a manner that its point shall project through said face plate and to .be exposed to the action of said wheel.

STERLING A. OAKLEY.

means for rotating the 

